Tread for a snowmobile



FIG. 1 is a top, right, front perspective view of the tread for a snowmobile showing my new design therefor;

FIG. 2 is a top plan view of a section thereof; and,

FIG. 3 is a side elevational view of a section thereof. 

CLAIM The ornamental design for a tread for a snowmobile, as shown and described. 